How to determine ED50 for BMP-2 through an in vitro assay?

06 July 2017 7,633 4 View

What is the appropriate regression model for the analysis of the Visual Analogue Scale and other scales with floor and ceiling scores?

Dear Researchers. The Visual Analogue Scale (VAS), and other similar scales, has a floor and a ceiling score; e.g.: 0 to 100. Usually, these scales are analysed with linear regression models, but...

02 March 2017 7,890 3 View

Does someone know guidelines for establishing relevance and feasibility of a health research proposal?

07 August 2016 6,539 1 View

Congratulations for your paper. Do you have the soil sampling depth and do you have papers of this type in Mediterranean and Atlantic environments?

No specific details

04 May 2016 3,784 0 View

Is it mandatory to adjust for sample survey design when analyzing regression models from complex surveys?

Dear RG Members. I am using the Demographic & Health Surveys (DHS) data in a research about children's maltreatment. As you know, DHS data have a complex sampling design with strata and...

22 April 2016 6,877 3 View

Is it mandatory to adjust for sample survey design when analyzing regression models from complex surveys?

Dear RG Members. I am using the Demographic & Health Surveys (DHS) data in a research about children's maltreatment. As you know, DHS data have a complex sampling design with strata and...

03 April 2016 9,688 3 View

How to calculate prevalence of a disease with missing data in the test of the survey?

Dear researchers. We are doing a study for estimating the prevalence of a disease diagnosed by a blood sample test. Some participants have answered the survey questionnaire but have refused the...

02 March 2016 4,341 3 View

What could you advise for controlling confounding in Structural Equation Modeling in Epidemiology?

Dear RG members. In epidemiological research, control of confounding is a core concept. Structural Equations Models (SEM) appear now as an alternative for epidemiological analyses. But, I could...

08 September 2015 6,614 2 View

What is the best way for modeling epidemiological time series data?

03 April 2015 5,651 8 View

How do I use multiple imputation procedures with factor analyses in Stata?

Dear RG Members, I am testing the factor structure of some psychological scales. The participants have some missing values in their items answers. Is it possible to use the multiple imputation...

02 March 2015 1,357 5 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

What is the difference between genotype and haplotype data in the ped format?

Hi everybody In the ped format for genotype, alleles of any SNP are represented by two columns (one for each allele, separated by a space). Is a column sufficient for the haplotype to...

27 February 2021 1,965 1 View